Regular Article

Dielectric response of polystyrene – BaTiO₃ nanocomposites

¹ Voronezh Institute of the Ministry of Internal Affairs of Russia, pr. Patriotov, 53, Voronezh 394065, Russian Federation
² Military Training and Scientific Center of Air Forces “Air Force Academy”, Staryh Bolshevikov st., 54 A, 394064 Voronezh, Russian Federation
³ Kursk State University, Radishcheva st., 33, 305000 Kursk, Russian Federation
⁴ Voronezh State Technical University, Moskovsky pr. 14, 394026 Voronezh, Russian Federation

^a e-mail: nikita_emelyanov@bk.ru

Received: 16 February 2016
Revised: 18 April 2016
Accepted: 15 June 2016
Published online: 26 July 2016

Abstract

The series of composite materials based on polystyrene and non-ferroelectric BaTiO₃ nanoparticles ((1-x)PS-xBT, where the volume concentration x = 0−1.0) was prepared. Their dielectric properties were studied within the temperature range 20–160 °C at the frequency of 100 kHz. It is found that an increase in the barium titanate concentration leads to increase of the both dielectric permittivity (ε) and dielectric losses (tgδ). The concentration dependence of ε can be described by the modified Kerner model. It was found that the glass transition in polystyrene matrix is diffused and its temperature is increased with concentration x.